Patent US3128707A successfully refreshed from Google Patents.
US3128707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple discharge hydraulic pump
Assignee: Individual
•
Filing: 1960-03-11
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Granted: 1964-04-14
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Expires: 1980-03-11
Abstract
No abstract record available.
Inventors
- 👤 Robert W Brundage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:07
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/06; F04C15/0003; F04C15/0023; F04C15/0026; F04C2/00; F04C2/08; F04C2/10; F04C2/102; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A HYDRAULIC PUMP OF THE TYPE CAPABLE OF SIMULTANEOUSLY DISCHARGING HYDRAULIC FLUID AT TWO DIFFERENT PRESSURES, SAID PUMP INCLUDING A PLURALITY OF MEMBERS DEFINING A PLURALITY OF CHAMBERS REVOLVING ON A FIXED LINE OF MOVEMENT AND WHICH PROGRESSIVELY INCREASE IN VOLUME TO A MAXIMUM AND THEN DECREASE IN VOLUME TO A MINIMUM AND THEN AGAIN INCREASE IN VOLUME TO A MAXIMUM, AN INLET PORT ARRANGED TO BE IN COMMUNICATION WITH SAID CHAMBERS AS THEY INCREASE IN VOLUME, THE IMPROVEMENT WHICH COMPRISES THREE SEPARATE DISCHARGE PORTS EACH ARRANGED ON THE LINE OF MOVEMENT OF SAID CHAMBERS TO BE IN COMMUNICATION AT ANY ONE INSTANT WITH DIFFERENT DECREASING VOLUME CHAMBERS AS THEY REVOLVE TO RECEIVE HYDRAULIC FLUID THEREFROM, AND MEANS INTERCONNECTING THE FIRST AND THIRD OF SAID PORTS.
Claim 2
Dependent Claim
127 words
IN A HYDRAULIC PUMP OF THE TYPE CAPABLE OF SIMULTANEOUSLY DISCHARGING HYDRAULIC FLUID AT TWO DIFFERENT PRESSURES, SAID PUMP INCLUDING A PLURALITY OF MEMBERS DEFINING A PLURALITY OF CHAMBERS REVOLVING ON A FIXED LINE OF MOVEMENT AND WHICH PROGRESSIVELY INCREASE IN VOLUME TO A MAXIMUM AND THEN DECREASE IN VOLUME TO A MINIMUM AND THEN AGAIN INCREASE IN VOLUME TO A MAXIMUM, AN INLET PORT ARRANGED TO BE IN COMMUNICATION WITH SAID CHAMBERS AS THEY INCREASE IN VOLUME, THE IMPROVEMENT WHICH COMPRISES THREE SEPARATE DISCHARGE PORTS EACH ARRANGED ON THE LINE OF MOVEMENT OF SAID CHAMBERS TO BE IN COMMUNICATION AT ANY ONE INSTANT WITH DIFFERENT DECREASING VOLUME CHAMBERS AS THEY REVOLVE TO RECEIVE HYDRAULIC FLUID THEREFROM, AND MEANS INTERCONNECTING THE FIRST AND THIRD OF SAID PORTS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |